Core java - Interview Questions and Answers for 'British telecom (bt)' | Search Java Interview Question

Core java - Interview Questions and Answers for 'British telecom (bt)' - 2 question(s) found - Order By Newest

Frequently asked in Infosys and HCL Technologies ( Based on 2 feedback )

Q1. What are different ways of object creation in Java ?

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Ans. Using new operator - new xyzClass()

Using factory methods - xyzFactory.getInstance( )

Using newInstance( ) method - (Class.forName(xyzClass))emp.newInstance( )

By cloning an already available object - (xyzClass)obj1.clone( )

Sample Code for object initialization using clone

Sample Code for object initialization using getInstance

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Q2. Difference between Vector and ArrayList ?

Core Java

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Ans. Vectors are synchronized whereas Array lists are not.

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